Hybrid product sampling system

ABSTRACT

A system, apparatus, and method for sampling of liquid products. The system includes a portable, releaseably connected product sample receiving assembly and a plurality of product sampling and mixing assemblies. The product sample receiving assembly can be attached and detached from two or more the product sampling and mixing assemblies, so that a single product sample receiving assembly can be used to service multiple product sampling and mixing assembly locations at different times. The product sample receiving assembly may include a slip-stream configuration or in-line configuration. The product sampling and mixing assemblies may be unidirectional or bidirectional.

BACKGROUND OF THE DISCLOSURE

1. Field of the Disclosure

This disclosure relates to the field of material sampling and analysisand, more specifically, to methods and devices for sampling fluidproducts, such as crude oil.

2. Description of the Related Art

Sampling of fluid products is performed so that the representativeproperties and composition of the fluid product can be estimated basedon analysis of a small subset of the whole (e.g. an accurate sample). Inorder for sampling to be effective in estimating the composition of alarger quantity of fluid, the sample that is extracted must be trulyrepresentative of the larger quantity.

When a fluid is evenly mixed, the sample is most likely representativeof the fluid as a whole, thus, the fluid may be mixed prior to thesampling taking place. This even mixing provides that all of the fluidis moving at the same linear velocity past a flow stream into which asampling probe is inserted. Sampling while the components of a mixtureare at the same linear velocity is called isokinetic sampling. While thefluid is thoroughly mixed, the sample is extracted from the fluid streamand set aside for analysis.

Isokinetic product sampling systems involve permanent installations withsignificant associated costs. Often located near transportation orloading hubs where custody transfer can take place, product samplingsystems for transport of crude oil may cost $1,500,000 or more.

A shortcoming of prior art product sampling systems is the high cost ofinstallation and installed equipment. Another shortcoming, related tothe high cost, is that sampling systems may not be cost effective forthe amount of product to be transported, leading to parties ortransporters to install product sampling systems at a loss or to forgoinstallation of a traditional product sampling system in favor of alower cost and lower accuracy solution. Another shortcoming of prior artproduct sampling systems is that, due to their size, they can only beused at a single location without extensive cost and time fordisassembly and reassembly. Another shortcoming is that sampling systemsare unidirectional.

For these reasons there is a need to develop a product sampling systemthat is more cost effective than traditional product sampling systems.

BRIEF SUMMARY OF THE DISCLOSURE

In aspects, the present disclosure is related to methods and apparatusesfor fluid sampling, specifically for liquid products.

One embodiment according to the present disclosure includes a productsampling system including: a product sample receiving assembly suitablefor liquid fluids; a first product sampling and mixing assemblyreleaseably connected to the product sample receiving assembly; a secondproduct sampling and mixing assembly, wherein the product samplereceiving assembly is configured to connect with the second productsampling and mixing assembly when the product sample receiving assemblyis detached from the first product sampling and mixing assembly. Thefirst and second product sampling and mixing assemblies may eachinclude: a tubular; a static mixer disposed in the tubular, wherein thestatic mixer defines an upstream side and a downstream side of thetubular; a sampler probe disposed on the downstream side of the tubular;a water injection port disposed on the upstream side of the tubular; anda flow meter disposed on the upstream side of the tubular between thewater injection port and the static mixer. One or both of the first andsecond product sampling and mixing assemblies may further include: aspot sample port on the downstream side of the tubular. The productsample receiving assembly may include a flow meter in fluidcommunication with the sampler probe; and a transportation container influid communication with the flow meter.

Another embodiment according to the present disclosure is a method ofoperating a product sampling system comprising: obtain a sample ofproduct from a first product sampling and mixing assembly with a productsample receiving assembly; detach the product sample receiving assemblyfrom the first product sampling and mixing assembly; and attach theproduct sample receiving assembly to a second product sampling andmixing assembly, wherein both of the first and second product samplingand mixing assemblies are configured to be releaseably attached to theproduct sample receiving assembly.

Examples of the more important features of the disclosure have beensummarized rather broadly in order that the detailed description thereofthat follows may be better understood and in order that thecontributions they represent to the art may be appreciated. There are,of course, additional features of the disclosure that will be describedhereinafter and which will form the subject of the claims appendedhereto.

BRIEF DESCRIPTION OF THE DRAWINGS

A better understanding of the present disclosure can be obtained withthe following detailed descriptions of the various disclosed embodimentsin the drawings, which are given by way of illustration only, and thusare not limiting the present disclosure, and wherein:

FIG. 1 shows a diagram of a product sampling system according to oneembodiment of the present disclosure;

FIG. 2A shows a diagram of an embodiment of a detachable samplingassembly in accordance with FIG. 1;

FIG. 2B shows a diagram of an embodiment of a permanent mixing assemblyand sample port in accordance with FIG. 1;

FIG. 3 shows a flow chart of an embodiment of a method for using thedetachable product sample receiving assembly with multiple productsampling and mixing assemblies in accordance with FIG. 1;

FIG. 4A shows a diagram of an embodiment of a product sampling andmixing assembly and portable sampling assembly with a slip-streamconfiguration in accordance with FIG. 1;

FIG. 4B shows a diagram of a monitoring and sampling panel for theproduct sampling system of FIG. 4A;

FIG. 5 shows a diagram of another embodiment of a bidirectional productsampling and mixing assembly and portable sampling assembly with aslip-stream configuration in accordance with FIG. 1; and

FIG. 6 shows a flow chart of an embodiment of a method for using thebidirectional product sampling and mixing assembly and portable samplingassembly with a slip-stream configuration of FIG. 5 in bidirectionalmode.

While the inventions disclosed herein are susceptible to variousmodifications and alternative forms, only a few specific embodiments areshown by way of example in the drawings and are described in detailbelow. The figures and detailed descriptions of these specificembodiments are not intended to limit the breadth or scope of theinventive concepts or the appended claims in any manner. Rather, thefigures and detailed written descriptions are provided to illustrate theinventive concepts to a person of ordinary skill in the art, and toenable such persons to make and use one or more of the inventiveconcepts.

DETAILED DESCRIPTION OF THE DISCLOSURE

In aspects, the present disclosure is related to methods and apparatusesfor fluid sampling. Specifically, the present disclosure is related tomeasurement of a flowing liquid product, such as crude oil. The presentinvention is susceptible to embodiments of different forms. There areshown in the drawings, and herein will be described in detail, specificembodiments with the understanding that the present invention is to beconsidered an exemplification of the principles and is not intended tolimit the present invention to that illustrated and described herein.

One or more illustrative embodiments incorporating the inventiondisclosed herein are presented below. Not all features of an actualimplementation are described or shown in this application for the sakeof clarity. It is understood that in the development of an actualembodiment incorporating the present invention, numerousimplementation-specific decisions must be made to achieve thedeveloper's goals, such as compliance with system-related,business-related, government-related and other constraints, which varyby implementation from time to time. While a developer's efforts mightbe complex and time consuming, such efforts would be, nevertheless, aroutine undertaking for those of ordinary skill in the art having thebenefit of this disclosure.

Accordingly, it is an object of the present invention to provide ahybrid product sampling system and apparatus, as well as an associatedmethod, to enable an operator to reduce cost multiple product samplingsystem installations. It is also an object of the invention to provide asampling assembly that can be used with multiple mixing assemblies.

While apparatuses and methods are described in terms of “comprising”various components or steps (interpreted as meaning “including, but notlimited to”), the compositions and methods can also “consist essentiallyof” or “consist of” the various components and steps, such terminologyshould be interpreted as defining essentially closed-member groups.

FIG. 1 shows a product sampling system 100, which includes a productsample receiving assembly 110 and a product sampling and mixing assembly120. The product may be transferred from the product sampling and mixingassembly 120 to the product sample receiving assembly 110 through atubular 130. The tubular 130 may be part of the product sampling system110 or part of the product sampling and mixing assembly 120. As shown inFIG. 1, the tubular 130 is part of the product sampling and mixingassembly 120. The product sampling system 100 may also include one ormore additional product sampling and mixing assemblies 140. In someembodiments, each of the one or more additional product sampling andmixing assemblies 140 may have an associated tubular 150.

The associated tubular 150 may be optional, especially if the tubular130 is associated with the product sample receiving assembly 110. Insome embodiments, tubular 130 and/or tubular 150 may be optional. Theproduct receiving assembly 110 and the first and second product samplingand mixing assemblies 120, 140 may be directly connected to one another.Regardless of a direct connection or connection through a tubular 130,150, the product receiving assembly 110 can be releaseably connected tothe first and second product sampling and mixing assemblies 120, 140.The releaseable connection between the product receiving assembly 110and the first and second product sampling and mixing assemblies 120, 140may be made by connector known to persons of ordinary skill in the artto be suitable for fluid sampling and custody transfer systems, and inparticular, liquid fluid sampling and custody transfer systems.

FIG. 2A shows an embodiment of the product sample receiving assembly 110for use with FIG. 1. The product sample receiving assembly 110 mayinclude a flow meter 1, a programmable logic controller (PLC) 2, a flowswitch 3, one or more transportation containers 4, a selector valve 5, ahydraulic unit with solenoid 6, a volume cylinder with regulator 7, anda purge gas tank 8. The flow meter 1 is configured to measure the flowof the product to be sampled into the product sample receiving assembly110. Products that may be sampled by the product sample receivingassembly 110 may include, but are not limited to, crude oil, hydrocarbonliquids, refined liquids, condensate, and water. The PLC controller 2 isconfigured to receive information for identifying the sample, includingbatch size, as well as, to control operation of the product samplereceiving assembly 110 and to print out information regarding thesample. The flow switch 3 or “bite checker” detects whether a sampleprobe 9 (see FIG. 2B) on the product sampling and mixing assembly 120has been injected into one of the transportation containers 4. The flowswitch 3 may be a time delayed flow switch. The flow switch 3 isoptional. The one or more transportation containers 4 are configured toreceive the product sample and be detached from the product samplereceiving assembly 110 for transport. Suitable transportation containersinclude portable sampling containers. The selector valve 5 is optionaland used to select the transportation container 4 to receive the productsample when two or more transportation containers 4 are present. Thehydraulic unit with solenoid 6 is optional. The hydraulic unit 6 isconfigured to operate a sampler in the product sampling and mixingassembly 120 when receiving a control signal from the PLC controller 2.The volume cylinder with regulator 7 is configured to purge the productsampler with gas that is non-reactive with the product and the samplereceiving equipment, such as nitrogen. The purge gas tank 8 holds thenon-reactive gas that is used to purge the product sampler. In someembodiments, the volume cylinder with regulator 7 and the purge gas tank8 may be optional. The product sample receiving assembly 110 may alsoinclude an electrical power supply (AC/DC) (not shown).

FIG. 2B shows an embodiment of the product sampling and mixing assembly120 in accordance with FIG. 1. The product sampling and mixing assembly120 includes the sample probe 9, a static mixer 10, a spot sample port11, a water injection port 12, one or more flow meters 13, and a tubular14. The sample probe 9 is disposed in the tubular 14 on the output sideof the static mixer 10, which is disposed within the tubular 14. Thetubular 14 is substantially straight, and the static mixer 10 definesthe upstream and downstream portions of the tubular 14. The sample probe9 is configured to draw a sample of fluid out of the flow stream of thefluid in the tubular 14 and exiting the static mixer 10. In someembodiments, the sampler probe 9 may be an automatic sampler probe. Thestatic mixer 10 mixes the liquid fluid to be sampled with free water.The spot sample port 11 is disposed in the tubular 14 in proximity tothe sample probe 9 and downstream of the static mixer 10. In someembodiments, the sample probe 9 may be upstream of the static mixer 10.The water injection port 12 is shown disposed in the tubular 14 upstreamof the static mixer 10; however, the water injection port 12 may bedisposed upstream or downstream of the static mixer 10. Between thestatic mixer 10 and the water injection port 12, at least one flow meter13 is disposed in or on the tubular 14. The position of the flow meter13 is exemplary and illustrative only, as the flow meter 13 may bedisposed in other locations along the tubular 14 as would be understoodby a person of skill in the art. The at least one flow meter 13 may beany flow measurement device suitable as understood by a person ofordinary skill in the art. Non-limiting exemplary flow meters 13 mayinclude an insertion flow meter and an ultrasonic liquid flowmeter.

FIG. 3 shows a flow chart of one embodiment of a method 300 foroperating product sampling system 100. In step 310, the product samplereceiving assembly 110 is in communication with the product sampling andmixing assembly 120. A sample of the product may be obtained with theproduct sampling and mixing assembly 120 and transferred to the samplereceiving assembly 110 in a manner understood by a person of ordinaryskill in the art. In step 320, the product sample receiving assembly 110is detached from the product sampling and mixing assembly 120. In step330 the product sample receiving assembly 110 is move to the additionalproduct sampling and mixing assembly 140. In step 340, the productsample receiving assembly 110 is connected with the additional productsampling and mixing assembly 140. In step 350, fluid is introduced tothe static mixer in the product sampling and mixing assembly 140 and thesample is taken. These steps can be repeated for as many additionalproduct sampling and mixing assemblies 140 are available. Through thismethod, the detachable product sample receiving assembly 110 provides amoveable, low cost alternative to a complete installation where theentire sampling and mixing operation are performed by a single unit. Thereusability of the detachable product sample receiving assembly 110allows a single product sample receiving assembly 110 to be reused atmultiple product sampling and mixing assemblies 140 at variouslocations.

FIG. 4A shows a slip-stream hybrid product sampling system 400, whichincludes a product sampling and mixing assembly 470 and a samplereceiving assembly 480. The product sampling and mixing assembly 470 iscomparable to the product sampling and mixing assembly 120, and thesample receiving assembly 480 is comparable to the sample receivingassembly 110, thus both may be configured as shown in FIG. 1 and use themethod 300 as shown in FIG. 3. An additional product sampling and mixingassembly 470 may be used as the additional product sampling and mixingassembly 140. The product sampling and mixing assembly 470 includes aflow line 401 that carries the product to be sampled. A flowmeter 405 iscoupled to the flow line 401 to measure the rate of flow of the product.The flowmeter 405 may include an insertion flowmeter, an ultrasonicflowmeter, or another suitable flowmeter as would be understood by oneof ordinary skill in the art. A water injection line 410 is coupled tothe flow line 401 to allow water to be injected into the product flow.The water injection line 410 is disposed downstream of the flowmeter405. The position of the water injection line 410 is illustrative andexemplary only, as the water injection line 410 may be disposed upstreamof the flowmeter 405 as well. A spot sample port 411 may be coupled toand receive fluid from the flow line 401. A static mixer 415 is disposedin-line with the flow line 401 to mix the product with the injectedwater. A suction assembly 420 is disposed on the flow line 401downstream of the static mixer 415. The suction assembly 420 includespiping and a valve to control product flow between the flow line 401 andthe sample receiving assembly 480. A discharge assembly 425 is disposedon the flow line 401 upstream of the static mixer 415. The dischargeassembly 425 includes piping and a valve to control product flow betweenthe flow line 401 and the sample receiving assembly 480. The position ofthe suction assembly 420 and the discharge assembly 425 on oppositesides of the static mixer 415 is exemplary and illustrative only. Insome embodiments, the suction assembly 420 and the discharge assembly425 may be on the same side of the static mixer 415. In someembodiments, the suction assembly 420 and the discharge assembly 425 maybe combined into a single concentric line (FIG. 5).

The sample receiving assembly 480 includes suction piping 430 that isconfigured to couple with the suction assembly 420, and discharge piping433 that is configured to couple with the discharge assembly 425. Thesuction piping 430 and the discharge piping 433 may include rigidpiping, flexible piping, or combinations thereof. Sampling, measurement,and detection devices may tap into the suction piping 430. An automaticsampler 435 may be coupled to and receive product flow from the suctionpiping 430. The automatic sampler 435 may include sample tanks, tubing,and, optionally, a bite checker. An optional water detector 440 may becoupled to and sample product from the suction piping 430. A manualsampler 445 may be coupled to and receive flow from the suction piping430. An optional densitometer/Coriolis flowmeter 450 may be coupled toand received flow from the suction piping 430. An optional viscometer455 may be coupled to and sample product from the suction piping 430. Apump 460 may be disposed between the suction piping 430 and thedischarge piping 433 to drive the product flow through the samplereceiving assembly 480. In some embodiments, the pump 460 may be capableof reversing the product flow (either by reversing the motor orswitching the orientation of the pump) to reverse the product flow. Byreversing the pump 460, the sample receiving assembly 480, flow may bereversed without switching around the suction piping 430 and thedischarge piping 433.

FIG. 4B shows an embodiment of a monitoring and sampling panel 482 foruse with the assembly 400 shown in FIG. 4A. The monitoring and samplingpanel 482 may include a housing 484, flowmeter electronics 486 coupledto the flow meter 405, a programmable logic controller and/or flowcomputer 488, and a power supply 490. The power supply 490 may beconfigured to supply power to the sample receiving assembly 480 and,optionally, the product sampling and mixing assembly 470 of the system400. The monitoring and sampling panel 482 may also include optionalwater detector electronics 492 coupled to the optional water detector440, optional densitometer electronics 494 coupled to the optionaldensitometer/Coriolis flowmeter 450, and/or optional viscometerelectronics 496 coupled to the optional viscometer 455. The monitoringand sampling panel 484 may include additional measurement devices, suchas a pressure transducer, a temperature transducer, and a weigh scalefor sample tanks coupled to the automatic sampler 435, as would beunderstood by a person of ordinary skill in the art. The programmablelogic controller/flow computer 488 receives power from the power supply490 and is in electronic communication with one or more of: theflowmeter electronics 486, the optional water detector electronics 492,the optional densitometer electronics 494, and the optional viscometerelectronics 496. The programmable logic controller and/or flow computer488 may use data signals from the measurement and detection devices tocomputer flow rate and regulate the pump 460. Control logic in theprogrammable logic controller 488 may be used to set, monitor, andinitiate a shutdown of the pump in response to programmed safetyparameters being exceeded. The control logic may also be used to controlsampling timing and compute trends of the data from the input devices.The programmable logic controller and/or flow computer 488 may alsotransmit flow measurement and product quality data to data storageon-site or to a remote receiving station (not shown). The power supply490 may supply power directly to devices on the product sampling andmixing assembly 470 and the sample receiving assembly 480 or may supplypower indirectly to devices on the product sampling and mixing assembly470 and the sample receiving assembly 480 by supplying power throughtheir corresponding electronics on the monitoring and sampling panel482.

In operation, the slip-stream hybrid product sampling system 400 may beoperated using the method 300, though the coupling operation may bedifferent. The assembly 400 may include more piping and portabledevices, but allows the sampling to be performed outside of the productflow though the flow line 401, which corresponds to the tubular 14.

FIG. 5 shows a slip-stream hybrid product sampling system 500, which maybe used as an alternative to system 400 or assembly 120. The system 500includes a product sampling and mixing assembly 570 and a samplingreceiving assembly 580. In operation as part of the system 100, a secondproduct sampling and mixing assembly 570 may be used as well. Theproduct sampling and mixing assembly 570 incorporates many of theelements of the assembly 470, and also includes a second water injectionline 510 and a second spot sample port 511, both disposed on the flowline 401. By disposing the second water injection line 510 and thesecond spot sample port 511 on the opposite side of the static mixer 415from the water injection line 410 and the spot sample port 411, theproduct sampling and mixing assembly 570 is new configured to operatebidirectionally.

The product sampling and mixing assembly 570 may also include anoptional combined suction/discharge assembly 520. The combinedsuction/discharge assembly 520 makes the suction and discharge linesconcentric and/or coaxial so that product flow from the flow line 401may enter the suction line and then return to the flow line 401 throughthe annular region between the suction line and the discharge line,which reduces the risks of incorrect connection and leakage. As would beunderstood by a person of skill in the art, the suction and dischargemay be reversed so that the discharge line is surrounded by the suctionline so that the suction flow is through the annular region between thesuction line and the discharge line. The combined suction/dischargeassembly 520 is shown disposed on the flow line 401 downstream of thestatic mixer 415; however, this is illustrative and exemplary only asthe combined suction/discharge assembly 520 may be installed upstream ofthe static mixer 415. The sample receiving assembly 580 includes acoupling 525 that can mate with the combined suction/discharge assemblyand, optionally, separate the suction and discharge flows in separatelines that connect to the suction piping 430 and the discharge piping433. In some embodiments, it is contemplated that the coupling 525 maybe part of the product sampling and mixing assembly 570 such that samplereceiving assembly 480 from FIG. 4A may be coupled to the productsampling and mixing assembly 570. In some embodiments, the combinedsuction/discharge assembly 520 and the coupler 525 are optional, and, asan alternative, the product sampling and mixing assembly 570 and thesample receiving assembly 580 may be coupled together using the suctionassembly 420 and the discharge assembly 425 as shown in FIG. 4A.

FIG. 6 shows a flow chart of a method 600 for operating the system 500in bidirectional mode. In step 610, a first sample is obtained from theproduct sampling and mixing assembly 570 with the sample receivingassembly 580 while a first product is flowing through the productsampling and mixing assembly 570 in a forward direction. The forwarddirection is from upstream to downstream in the flow line 401, which aredefined by the position of the static mixer 415 on said flow line 401.In step 620, a second product is flowed through the product sampling andmixing assembly 570 in a reverse direction (e.g. the opposite of theforward direction). In step 630, a second sample is obtained from theproduct sampling and mixing assembly 570 with the sample receivingassembly 580 while the second product is flowing in the reversedirection. The first and second products may be the same or differentmaterials.

While the various embodiments of the present invention disclosed hereinhave been made in the context of crude oil fluid sampling, it will beappreciated that the inventive concepts taught herein have applicationto all types of liquid products. Moreover, the application of theseinventions is not limited to the oil and gas industry, but may beimplemented anywhere that it is desirable that a flow stream of liquidsbe sampled.

All of the methods, processes, and/or apparatus disclosed and claimedherein can be made and executed without undue experimentation in lightof the present disclosure. While the methods and apparatus of thisinvention have been described in terms of preferred embodiments, it willbe apparent to those of skill in the art that variations may be appliedto the methods, processes and/or apparatus and in the steps or in thesequence of steps of the methods described herein without departing fromthe concept and scope of the invention. More specifically, it will beapparent that certain features which are both mechanically andfunctionally related can be substituted for the features describedherein while the same or similar results would be achieved. All suchsimilar substitutes and modifications apparent to those skilled in theart are deemed to be within the scope and concept of the invention.

While embodiments in the present disclosure have been described in somedetail, according to the preferred embodiments illustrated above, it isnot meant to be limiting to modifications such as would be obvious tothose skilled in the art.

The foregoing disclosure and description of the disclosure areillustrative and explanatory thereof, and various changes in the detailsof the illustrated apparatus and system, and the construction and themethod of operation may be made without departing from the spirit of thedisclosure.

What is claimed is:
 1. A product sampling system comprising: a productsample receiving assembly suitable for liquid fluids; a first productsampling and mixing assembly releaseably connected to the product samplereceiving assembly; a second product sampling and mixing assembly,wherein the product sample receiving assembly is configured to connectwith the second product sampling and mixing assembly when the productsample receiving assembly is detached from the first product samplingand mixing assembly.
 2. The system of claim 1, the first and secondproduct sampling and mixing assemblies each comprising: a tubular; astatic mixer disposed in the tubular, wherein the static mixer definesan upstream side and a downstream side of the tubular; a sampler probedisposed on the downstream side of the tubular; a water injection portdisposed on the tubular; and a flow meter disposed on the tubular; 3.The system of claim 2, wherein at least one of the first and secondproduct sampling and mixing assemblies further comprises: a spot sampleport on the downstream side of the tubular.
 4. The system of claim 2,the product sample receiving assembly comprising: a flow meter in fluidcommunication with the sampler probe; and a transportation container influid communication with the flow meter.
 5. The system of claim 2, theproduct sample receiving assembly comprising: a flow meter in fluidcommunication with the sampler probe; and a transportation container influid communication with the flow meter.
 6. The system of claim 1, thefirst and second product sampling and mixing assemblies each comprising:a tubular; a static mixer disposed in the tubular, wherein the staticmixer defines an upstream side and a downstream side of the tubular; asuction assembly disposed on the downstream side of the tubular; adischarge assembly disposed on the upstream side of the tubular; a flowmeter disposed on the upstream side of the tubular; and a waterinjection port disposed on the upstream side of the tubular between theflow meter and the static mixer.
 7. The system of claim 6, wherein theproduct sample receiving assembly further comprises: suction pipingconfigured to couple with the suction assembly; discharge pipingconfigured to couple with the discharge assembly; and a pump disposedbetween the suction piping and the discharge piping.
 8. The system ofclaim 2, further comprising: an additional water injection line disposedon the tubular, wherein the water injection line is on the upstream sideof the static mixer and the additional water injection line is on thedownstream side of the static mixer.
 9. The system of claim 2, furthercomprising: an additional water injection line disposed on the upstreamside of the tubular.
 10. The system of claim 1, the first and secondproduct sampling and mixing assemblies each comprising: a tubular; astatic mixer disposed in the tubular, wherein the static mixer definesan upstream side and a downstream side of the tubular; a suctionassembly disposed on the tubular; a discharge assembly disposed on thetubular, wherein the discharge assembly is disposed within andconcentric with the suction assembly; a flow meter disposed on thetubular; and a water injection port disposed on the tubular.
 11. Amethod of operating a product sampling system comprising: obtain asample of product from a first product sampling and mixing assembly witha product sample receiving assembly; detach the product sample receivingassembly from the first product sampling and mixing assembly; and attachthe product sample receiving assembly to a second product sampling andmixing assembly, wherein both of the first and second product samplingand mixing assemblies are configured to be releaseably attached to theproduct sample receiving assembly.
 12. A method of operating a productsampling system comprising: obtain a sample of a first product from aproduct sampling and mixing assembly with a product sample receivingassembly with the product flowing in a forward direction; flowing asecond product through the product sampling and mixing assembly in areverse direction; and obtain a sample of a second product from theproduct sampling and mixing assembly with the product sample receivingassembly while the second product is flowing in a reverse direction.